Used by observatories, research institutions and universities

ASA400 Ritchey-Chrétien f8 telescope

A perfect fit for the ASA Direct Drive Mounts, with absolute encoders.

Optics without compromise!

ASA Telescopes are equipped with quartz glass optics from ASA (L/8 wavefront Peak to Valley). This makes us to one of the few manufacturers that achieves the surface quality required for diffraction limited performance under best seeing conditions.

Main Data  
Focal length 3200 mm
Focal ratio f8
Corrected field of View 70 mm diagonal
Mirror material Fused Silica (quartz), ultra low thermal expansion 0.55e-6/°C
Main Mirror 400 mm hyperbolic
Weight 52 kg
Software ASA Software, Windows package and Linux SDK (optional)
System Performance with ASA Direct Drive
Pointing accuracy < 12” RMS with pointing model (for altitude 20° to 85°)
Tracking accuracy < 0,35” RMS within 5 minutes (at optimal ambient and sky conditions) over 5 min 0,07” RMS/min
Slewing speed 6°/sec (up to 10°/sec optional)

Basic Equipment

  • ASA 400 telescope with ASA optics
  • All tools necessary for telescope installation
  • Laser for optical collimation

0x more precise

with ASA Direct Drive Mount

0% more favorable

ASA Modular System

Optional Equipment

  • ASA Direct Drive Mounts f.e. DDM100
  • ASA filter wheel for 4x 100 x 100 mm filters
  • Customer specific camera adapter
  • Correctors: Field Flattener, Reducers
  • ASA-UPS (uninterruptable power supply)
  • Main mirror cover


ASA 400 with DDM85 in Germany

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ASA 400 in Spain

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ASA400 on DDM85, Germany

DLR observe space debris with ASA.

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seeing is believing.